ffi: conv between strings and char/wchar_t arrays.

* ffi.c (struct txr_ffi_type): New bitfield members
char_conv, wchar_conv.
(ffi_array_put): Check char_conv and wchar_conv flags
and perform conversion to string, watching out for the
presence or absence of null termination.
(ffi_type_compile): When compiling array, check for the
str and wstr element type, and set the flags.

* utf8.c (ut8f_dup_from_buf): New function.

* utf8.c (ut8f_dup_from_buf): Declared.

1 files changed, 8 insertions, 0 deletions

diff --git a/utf8.c b/utf8.c
index f0084230..206a7e70 100644
--- a/utf8.c
+++ b/utf8.c
@@ -207,6 +207,14 @@ wchar_t *utf8_dup_from(const char *str)
   return wstr;
 }
 
+wchar_t *utf8_dup_from_buf(const char *str, size_t size)
+{
+  size_t nchar = utf8_from_buf(0, coerce(const unsigned char *, str), size);
+  wchar_t *wstr = chk_wmalloc(nchar);
+  utf8_from_buf(wstr, coerce(const unsigned char *, str), size);
+  return wstr;
+}
+
 unsigned char *utf8_dup_to_buf(const wchar_t *wstr, size_t *pnbytes,
                                int null_term)
 {